import CryptoJS from 'crypto-js';

//随机生成指定数量的16进制key
export function generatekey(num) {
  let library = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
  let key = "";
  for (var i = 0; i < num; i++) {
    let randomPoz = Math.floor(Math.random() * library.length);
    key += library.substring(randomPoz, randomPoz + 1);
  }
  return key;
}

//加密
export function encrypt(word, keyStr) {
  keyStr = keyStr ? keyStr : 'mkYHDYiemc5tf0Mt7KcAJhuZoyaGwbep'; //判断是否存在ksy，不存在就用定义好的key
  var key = CryptoJS.enc.Utf8.parse(keyStr);
  var srcs = CryptoJS.enc.Utf8.parse(word);
  var encrypted = CryptoJS.AES.encrypt(srcs, key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 });
  return encrypted.toString();
}
//解密
export function decrypt(word, keyStr) {
  keyStr = keyStr ? keyStr : 'mkYHDYiemc5tf0Mt7KcAJhuZoyaGwbep';
  // let newWord=CryptoJS.enc.Base64.parse(word)
  // let src=CryptoJS.enc.Base64.stringify(newWord)
  var key = CryptoJS.enc.Utf8.parse(keyStr);
  var decrypt = CryptoJS.AES.decrypt(word, key, {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7,
  });
  return CryptoJS.enc.Utf8.stringify(decrypt).toString();
}
